JPH06289812A - Image display method and apparatus - Google Patents
Image display method and apparatusInfo
- Publication number
- JPH06289812A JPH06289812A JP5100233A JP10023393A JPH06289812A JP H06289812 A JPH06289812 A JP H06289812A JP 5100233 A JP5100233 A JP 5100233A JP 10023393 A JP10023393 A JP 10023393A JP H06289812 A JPH06289812 A JP H06289812A
- Authority
- JP
- Japan
- Prior art keywords
- display
- image
- display panel
- pdp
- detected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/2803—Display of gradations
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
- G09G2340/0428—Gradation resolution change
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/141—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light conveying information used for selecting or modulating the light emitting or modulating element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Plasma & Fusion (AREA)
- Control Of Gas Discharge Display Tubes (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
(57)【要約】
【目的】 ＰＤＰに画像を表示する際、種々状況によっ
ても良好な画像を得る。
【構成】 入力映像信号による画像をＰＤＰ１に表示す
る画像表示装置において、同入力映像信号により、表示
画像（表示画面上）の輝度、色相の空間分布を空間分布
検出部２ａで検出し、その空間分布の時間的な変化を時
間的変化部２ｂで検出するととももに、ＰＤＰ１の周囲
の明るさ（入射光量）をパネル入射光量検出部２ｃで検
出し、同ＰＤＰ１の各部位の温度をパネル温度検出部２
ｄで検出し、これら検出した情報をファジィ制御部３に
入力しており、このファジィ制御部３はＰＤＰ１の入力
信号の特性（ガンマ値等）、同ＰＤＰの表示パラメータ
（表示階調数、最小階調数当りの表示ビット数等）を総
合的に最適化する制御データを算出し、この制御データ
をＰＤＰ１を制御、駆動する出力制御部４およびパネル
表示制御部５に出力する。
(57) [Summary] [Purpose] When displaying an image on a PDP, a good image is obtained depending on various situations. In an image display device for displaying an image based on an input video signal on a PDP 1, the spatial distribution detection unit 2a detects the spatial distribution of brightness and hue of the display image (on the display screen) based on the input video signal, and the space is detected. The temporal change of the distribution is detected by the temporal change unit 2b, and at the same time, the ambient brightness (incident light amount) of the PDP 1 is detected by the panel incident light amount detection unit 2c, and the temperature of each part of the PDP 1 is detected as the panel temperature. Detector 2
The information detected by d is input to the fuzzy control unit 3. The fuzzy control unit 3 receives the characteristics (gamma value, etc.) of the input signal of the PDP 1, the display parameters of the PDP (the number of display gradations, the minimum Control data for comprehensively optimizing the number of display bits per number of gradations) is calculated, and this control data is output to the output control unit 4 and the panel display control unit 5 that control and drive the PDP 1.
Description
【０００１】[0001]
【産業上の利用分野】この発明はテレビジョン等の表示
系における映像信号処理、画像表示技術に係り、特に詳
しくはＰＤＰ（Ｐｌａｓｍａ Ｄｉｓｐｌａｙ Ｐａｎ
ｅｌ）に表示する画像を最適なものとする画像表示方法
およびその装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to video signal processing and image display technology in a display system such as a television, and more particularly, to a PDP (Plasma Display Pan).
The present invention relates to an image display method and an apparatus for optimizing an image displayed in (e).
【０００２】[0002]
【従来の技術】近年、このＰＤＰは、平面ディスプレイ
の中でも大画面等に優れており、かつフルカラー表示や
高速の階調表示が可能なことから、薄型の大画面カラー
表示装置（例えば壁掛けテレビジョン）に用いられよう
としている。2. Description of the Related Art In recent years, this PDP is excellent in a large screen among flat displays, and is capable of full-color display and high-speed gradation display, so that it is a thin large-screen color display device (for example, a wall-mounted television). ) Is about to be used.
【０００３】ところで、メモリ機能を有するパルス駆動
方式のＰＤＰ装置では、例えばテレビ画面等の中間調表
示を行う場合、画像表示するために映像信号（ビデオ信
号）をディジタル化し、表示フィールド期間をビデオ信
号の各ビットに対応するサブフィールドに分け、同各サ
ブフィールドに表示（放電）パルス数を割り当てて画像
表示を行っている。In a pulse drive type PDP device having a memory function, for example, when performing halftone display on a television screen or the like, a video signal (video signal) is digitized to display an image, and a display field period is a video signal. The image is displayed by dividing the subfields corresponding to the respective bits and assigning the number of display (discharge) pulses to the respective subfields.
【０００４】すなわち、上記ＰＤＰは２値で動作するた
め、表示フィールド期間をビデオ信号のビットで分割し
たサブフィールド毎に２値の画像を順次表示し、積み重
ねて画像を合成して階調表示を行っている。That is, since the PDP operates in binary, a binary image is sequentially displayed for each subfield obtained by dividing the display field period by the bits of the video signal, and the images are stacked to synthesize the images for gradation display. Is going.
【０００５】上記画像表示方法における表示画像の輝度
は表示パルス数に比例するが、各フィールド内での表示
パルス数の増加はパルス周波数を大きくし、ＰＤＰの各
表示画素の動作の不安定、同ＰＤＰの発熱の増大とな
り、同ＰＤＰの寿命や故障の原因となる。そこで、上記
表示パルス数を制約し、動作の不安定、発熱の増大を防
止している。The brightness of the display image in the above image display method is proportional to the number of display pulses, but an increase in the number of display pulses in each field increases the pulse frequency, resulting in unstable operation of each display pixel of the PDP. This will increase the heat generation of the PDP, which will cause the life and failure of the PDP. Therefore, the number of display pulses is restricted to prevent unstable operation and increase in heat generation.
【０００６】[0006]
【発明が解決しようとする課題】ところで、上記ＰＤＰ
の表示画素を駆動するためのアドレッシングの時間が同
表示画素の表示パルス印加時間に比して大きい比率を占
めているため、サブフィールド数（表示ビット数に対応
するもの）を多くし、表示階調数を大きくすると、表示
画像が暗くなる。By the way, the above PDP
Since the addressing time for driving the display pixel occupies a larger ratio than the display pulse application time of the same display pixel, the number of subfields (corresponding to the number of display bits) is increased and When the number of keys is increased, the displayed image becomes darker.
【０００７】そのため、カラーテレビ画面の表示として
は、十分な階調（２５６階調（８ビット，８サブフィー
ルド））をとることが困難で、ＡＣ形（ＡＣ駆動方式）
のＰＤＰでは６４階調（６サブフィールド）程度にとど
まっている。Therefore, it is difficult to obtain sufficient gradation (256 gradations (8 bits, 8 subfields)) for display on a color television screen, and an AC type (AC drive system)
The PDP has only 64 gradations (6 subfields).
【０００８】すなわち、入力映像信号によってそのまま
画像を表示すると、明るい画面ではＰＤＰの発熱、消費
電力の増大し易く、表示画面の白部分がつぶれるという
問題点がある。また、暗い画面では、逆に表示画面の黒
部分がつぶれ、コントラストの低下、色調の変化の問題
がある。さらに、ＰＤＰの周囲が明るい場合コントラス
トが低下し、同ＰＤＰの周囲が暗い場合画面がまぶしく
なる。さらにまた、室温が高い場合、ＰＤＰの温度を上
昇し、悪影響を与え、かつ表示画面の明るさによっても
そのＰＤＰの温度が上昇する。That is, when an image is displayed as it is by an input video signal, there is a problem that a bright screen easily causes heat generation and power consumption of the PDP and a white portion of the display screen is crushed. On the other hand, on a dark screen, the black portion of the display screen is crushed, which causes problems of lowering contrast and changing color tone. Further, when the surroundings of the PDP are bright, the contrast is lowered, and when the surroundings of the PDP are dark, the screen becomes dazzled. Furthermore, when the room temperature is high, the temperature of the PDP rises, which has an adverse effect, and the temperature of the PDP also rises depending on the brightness of the display screen.
【０００９】この発明は上記課題に鑑みなされたもので
あり、その目的は表示パネルの入力信号の特性、同表示
パネルの周囲等の状況に応じて総合的に最適化した良好
な画像を表示することができ、ひいては表示画像の画質
の向上を図り、画像をきれに表示することができるよう
にした画像表示方法およびその装置を提供することにあ
る。The present invention has been made in view of the above problems, and an object thereof is to display a good image that is comprehensively optimized according to the characteristics of the input signal of the display panel, the surroundings of the display panel, and the like. It is therefore an object of the present invention to provide an image display method and device for improving the image quality of a display image so that the image can be displayed sharply.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に、この発明の画像表示方法およびその装置は、入力映
像信号による画像を表示パネル（ＰＤＰ）に表示する
際、同入力映像信号から同表示パネルにそのまま表示し
たときの表示画像の特性を検出し、かつ同表示パネルの
状況を検出し、該検出した情報に応じて前記表示パネル
の入力信号の特性、同表示パネルの種々パラメータ値を
総合的に最適化するようにしたことを要旨とする。In order to achieve the above object, the image display method and apparatus of the present invention, when displaying an image based on an input video signal on a display panel (PDP), use the same input video signal. The characteristics of the display image when it is displayed on the display panel as it is is detected, and the status of the display panel is detected, and the characteristics of the input signal of the display panel and various parameter values of the display panel are detected according to the detected information. The main point is to make a comprehensive optimization.
【００１１】[0011]
【作用】上記手段によると、入力映像信号により表示画
像の輝度、色相の空間分布、同空間分布の時間的な変化
が検出され、表示パネルの所定カ所に配置した光センサ
からの信号により同表示パネルの入射光量（情報）が検
出され、同表示パネルの所定カ所に配置した温度センサ
からの信号により同表示パネルの温度（情報）が検出さ
れる。According to the above means, the luminance of the display image, the spatial distribution of the hue, and the temporal change of the spatial distribution are detected by the input video signal, and the same display is made by the signal from the optical sensor arranged at a predetermined position of the display panel. The amount of light (information) incident on the panel is detected, and the temperature (information) of the display panel is detected by a signal from a temperature sensor arranged at a predetermined position of the display panel.
【００１２】そして、上記ファジィ演算による制御にて
上記情報に基づいて表示パネルの入力信号の特性、同表
示パネルの種々パラメータ値が総合的に最適化にされ
る。この制御により、入力映像信号が補正され、この補
正した信号が表示パネルの入力信号とされ、かつ表示パ
ネルを駆動するための信号の種々パラメータ値が補正さ
れる。具体的には、表示パネルの入力信号のガンマ値、
振幅やレベル等が補正され、かつ同表示パネルをパルス
駆動する際の階調数、最小階調数当りの表示ビット数が
補正される。Then, the characteristics of the input signal of the display panel and various parameter values of the display panel are comprehensively optimized based on the above information under the control by the fuzzy calculation. By this control, the input video signal is corrected, the corrected signal is used as the input signal of the display panel, and various parameter values of the signal for driving the display panel are corrected. Specifically, the gamma value of the input signal of the display panel,
The amplitude, level, and the like are corrected, and the number of gradations and the number of display bits per minimum number of gradations when pulse driving the display panel are corrected.
【００１３】[0013]
【実施例】この発明の画像表示方法およびその装置は、
入力映像信号により、表示画像（表示画面上）の輝度、
色相の空間分布およびその時間的変化を検出するととも
もに、表示パネル（ＰＤＰ；プラズマディスプレイパネ
ル）の周囲の明るさ（入射光量）および同ＰＤＰの各部
位の温度を検出し、これら検出した情報に基づいてＰＤ
Ｐの入力信号の特性（ガンマ値等）、同ＰＤＰの表示パ
ラメータ（階調数、最小階調数当りの表示ビット数等）
を総合的に最適化し、種々状況によっても、良好な画像
を表示する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Depending on the input video signal, the brightness of the display image (on the display screen),
In addition to detecting the spatial distribution of hue and its temporal change, the ambient brightness (incident light amount) of the display panel (PDP; plasma display panel) and the temperature of each part of the PDP are detected, and the detected information is detected. PD based on
P input signal characteristics (gamma value, etc.), display parameters of the same PDP (gray scale, display bit count per minimum gray scale, etc.)
Is comprehensively optimized to display a good image in various situations.
【００１４】そこで、図１に示すように、この発明の画
像表示装置は、例えば入力ディジタルビデオ信号による
画像を表示する表示パネル（ＰＤＰ）１と、入力映像信
号により表示画像の情報を検出し、ＰＤＰ１の入射光
量、同ＰＤＰ１の各部位の温度を検出する検出系部２
と、この検出系部２で検出した情報を入力し、入力映像
信号による表示画像を最適な状態で表示パネルに表示す
るために同表示パネルに入力する信号の各種値や同表示
パネルの各種パラメータを変える制御データを算出する
ファジィ制御部３と、このファジィ制御部３によって算
出した制御データにより、入力映像信号のＲ，Ｇ，Ｂ各
原色信号個々のガンマ値、白および黒部の伸張特性、振
幅、レベルを補正して出力する出力制御部４と、前記フ
ァジィ制御手段によって算出した制御データにより、少
なくとも階調数（サブフィールド数）、最小階調当りの
表示ビット数を制御するためのパネル表示制御部５とを
備えている。Therefore, as shown in FIG. 1, the image display apparatus of the present invention detects, for example, a display panel (PDP) 1 for displaying an image by an input digital video signal and information of the display image by an input video signal, Detection system unit 2 for detecting the amount of incident light on the PDP 1 and the temperature of each part of the PDP 1.
And various values of signals input to the display panel for inputting the information detected by the detection system unit 2 and displaying the display image by the input video signal on the display panel in the optimum state and various parameters of the display panel. The fuzzy control unit 3 for calculating control data for changing the color, and the control data calculated by the fuzzy control unit 3 are used to determine the gamma value of each R, G, B primary color signal of the input video signal, the expansion characteristics of the white and black parts, and the amplitude. A panel display for controlling at least the number of gradations (the number of subfields) and the number of display bits per minimum gradation by the output control unit 4 for correcting and outputting the level and the control data calculated by the fuzzy control means. And a control unit 5.
【００１５】上記検出系部２は、入力映像信号による表
示画像（画面上）の輝度、色相（例えば肌色等）の空間
分布を検出する空間分布検出部２ａと、入力映像信号に
より表示画像の輝度、色相の時間的変化を検出する時間
的変化検出部２ｂと、ＰＤＰ１の所定箇所に配置した光
センサからの信号により同ＰＤＰ１の入射光量を検出す
る入射光量検出部２ｃと、ＰＤＰ１の複数箇所に配置し
た温度センサからの信号により同ＰＤＰ１の表示パネル
の温度を検出する温度検出部２ｄとを備えている。The detection system unit 2 detects the brightness of the display image (on the screen) and the spatial distribution of hue (for example, skin color) by the input video signal, and the brightness of the display image by the input video signal. , A temporal change detection unit 2b that detects a temporal change in hue, an incident light amount detection unit 2c that detects the incident light amount of the PDP 1 by a signal from an optical sensor arranged at a predetermined position of the PDP 1, and a plurality of positions in the PDP 1. The temperature detector 2d is provided for detecting the temperature of the display panel of the same PDP 1 by a signal from the temperature sensor arranged.
【００１６】次に、上記構成の画像表示装置の動作、画
像表示方法の作用を図２の表示輝度特性図を参照して説
明すると、まず入力映像信号による画像（カラー画像）
をＰＤＰ１に表示するものとする。Next, the operation of the image display apparatus having the above-described structure and the operation of the image display method will be described with reference to the display luminance characteristic diagram of FIG.
Shall be displayed on PDP1.
【００１７】すると、検出系部２は入力映像信号を入力
し、同検出系部２の空間分布検出部２ａは入力映像信号
による画像（表示画面上）の輝度、色相の空間分布を検
出し、同検出系部２の時間的変化検出部２ｂはその空間
分布の時間的な変化を検出する。Then, the detection system unit 2 inputs the input video signal, and the spatial distribution detection unit 2a of the detection system unit 2 detects the spatial distribution of the luminance and hue of the image (on the display screen) by the input video signal, The temporal change detection unit 2b of the detection system unit 2 detects a temporal change in the spatial distribution.
【００１８】また、検出系部２はＰＤＰ１の所定カ所に
設けた光センサおよび同ＰＤＰ１の所定カ所に設けた複
数の温度センサによる検出信号を入力し、同検出系部２
のパネル入射光量検出部２ｃはＰＤＰ１の入射光量（Ｐ
ＤＰ１の周囲の明るさ）を検出し、同検出系部２のパネ
ル温度検出部２ｄはＰＤＰ１の温度を検出する。Further, the detection system unit 2 inputs detection signals from an optical sensor provided at a predetermined place of the PDP 1 and a plurality of temperature sensors provided at a predetermined place of the PDP 1, and the detection system unit 2
The panel incident light amount detection unit 2c of the
The brightness around the DP1) is detected, and the panel temperature detection unit 2d of the detection system unit 2 detects the temperature of the PDP1.
【００１９】そして、上記検出した情報、つまり表示画
面上の輝度、色相の空間分布、その空間分布の時間的な
変化、ＰＤＰ１の周囲の明るさおよびＰＤＰ１の温度を
ファジィ制御部３に入力する。これにより、ファジィ制
御部３はその情報を前件部項目とし、予め決定している
ファジィ理論を用いて後件部項目であるＰＤＰ１の入力
信号を出力する出力制御部４およびパネル表示制御部５
の制御データを算出する。Then, the detected information, that is, the brightness on the display screen, the spatial distribution of hues, the temporal change of the spatial distribution, the brightness around the PDP 1 and the temperature of the PDP 1 are input to the fuzzy controller 3. As a result, the fuzzy control unit 3 uses the information as the antecedent part item, and outputs the input signal of the PDP 1 which is the consequent part item using a predetermined fuzzy theory, and the panel display control unit 5.
The control data of is calculated.
【００２０】上記ファジィ制御部３は、ＰＤＰ１の入力
信号のガンマ値、黒、白の伸張特性、振幅、レベルを入
力情報（表示画像の輝度、色相の空間分布およびその空
間分布の時間的な変化）に基づいて補正する制御データ
を算出して出力制御部４に出力する。The fuzzy control section 3 inputs the gamma value, the expansion characteristic of black and white, the amplitude and the level of the input signal of the PDP 1 as input information (luminance of display image, spatial distribution of hue and temporal change of the spatial distribution). ), The control data to be corrected is calculated and output to the output control unit 4.
【００２１】また、上記ファジィ制御部３は、ＰＤＰ１
をパルス駆動するためのサブフィールド数（表示パルス
数）、最小表示階調数当りの表示ビット数を入力情報
（周囲の明るさおよびパネルの温度）に基づいて補正す
る制御データを算出してパネル表示制御部５に出力す
る。Further, the fuzzy control section 3 has a PDP 1
Calculate the control data to correct the number of subfields (the number of display pulses) for pulse driving of the display, and the number of display bits per minimum number of display gradations based on the input information (ambient brightness and panel temperature) and calculate the panel. Output to the display control unit 5.
【００２２】上記ファジィ制御部３における演算は、例
えば入力映像信号によってそのまま表示する画像が明る
い場合（明るい画面の場合；図２の矢印ａに示す）、同
明るさを抑え、表示画面の白部分がつぶれることのない
程度に白ピークを得るように、入力映像信号のガンマ
値、黒および白の伸張特性、振幅、レベルを所定に補正
し、さらに表示サブフィールド数（表示パルス数）、最
小表示階調数当りの表示ビット数を所定に補正する制御
データを算出する。The calculation in the fuzzy control section 3 is carried out, for example, when the image to be displayed as it is according to the input video signal is bright (in the case of a bright screen; indicated by an arrow a in FIG. 2), the brightness is suppressed and the white portion of the display screen is suppressed. The gamma value of the input video signal, the expansion characteristics of black and white, the amplitude, and the level are corrected in order to obtain a white peak to the extent that the image is not crushed, and the number of display subfields (the number of display pulses) and the minimum display Control data for correcting the number of display bits per number of gradations is calculated.
【００２３】上記ファジィ制御で算出された各表示画面
毎の輝度、コントラスト、色再現域を総合的に改善する
制御データは出力制御部４およびパネル表示制御部５に
出力され、同出力制御部４は同入力制御データに基づい
て補正した信号をＰＤＰ１に出力するとともに、同パネ
ル表示制御部５は同入力制御データに基づいてＰＤＰ１
をパルス駆動することになる。The control data for comprehensively improving the brightness, contrast and color reproduction area of each display screen calculated by the fuzzy control is output to the output control section 4 and the panel display control section 5, and the output control section 4 is also provided. Outputs a signal corrected based on the same input control data to the PDP 1, and the same panel display control unit 5 causes the PDP 1 based on the same input control data.
Will be pulse-driven.
【００２４】これにより、入力映像信号による画像が明
るい場合であっても、ＰＤＰ１の発熱、消費電力を抑
え、かつ表示画像の白部分がつぶれることもなく、良好
なカラー画像、つまりきれいな画像を表示することがで
きる。As a result, even if the image by the input video signal is bright, heat generation and power consumption of the PDP 1 are suppressed, and the white portion of the display image is not crushed, and a good color image, that is, a beautiful image is displayed. can do.
【００２５】入力映像信号によってそのまま表示する画
像が暗い場合（暗い画面の場合；図２の矢印ｂに示
す）、同暗さを抑え、黒つぶれのないように、上記同様
のファジィ制御により、入力映像信号のガンマ値を補正
し、黒および白の伸張特性、振幅、レベルを所定に補正
し、さらに表示サブフィールド数（表示パルス数）、最
小表示階調数当りの表示ビット数を所定に補正する制御
データを算出する。When the image to be displayed as it is due to the input video signal is dark (in the case of a dark screen; indicated by the arrow b in FIG. 2), the same darkness is suppressed and the fuzzy control is performed in the same manner as described above so as to prevent blackening. Corrects the gamma value of the video signal, corrects the black and white expansion characteristics, amplitude, and level, and also corrects the display subfield number (display pulse number) and display bit number per minimum display gradation number. Control data to be calculated.
【００２６】これにより、入力映像信号による画像が逆
に暗い場合であっても、表示画面の黒部分がつぶれるこ
ともなく、コントラストの低下、色調の変化を抑え、良
好なカラー画像、つまりきれいな画像を表示することが
できる。As a result, even if the image due to the input video signal is dark, the black portion of the display screen will not be crushed, the deterioration of the contrast and the change of the color tone can be suppressed, and a good color image, that is, a beautiful image can be obtained. Can be displayed.
【００２７】上記ＰＤＰ１の周囲が明るい場合、上記同
様のファジィ制御により例えば表示画面のコントラスト
低下を抑えるように、ＰＤＰ１の温度を加味して入力映
像信号の輝度等（また表示パルス数等）を上げる制御デ
ータを算出する。ＰＤＰ１の周囲が暗い場合、上記同様
のファジィ演算により表示画面のまぶしさを抑えるよう
に、例えば入力映像信号の輝度等を下げる制御データを
算出する。When the surroundings of the PDP 1 are bright, the brightness of the input video signal (and the number of display pulses, etc.) is increased in consideration of the temperature of the PDP 1 by the fuzzy control similar to the above so as to suppress the deterioration of the contrast of the display screen. Calculate control data. When the surroundings of the PDP 1 are dark, control data for reducing the brightness of the input video signal or the like is calculated by the fuzzy calculation similar to the above so as to suppress the glare of the display screen.
【００２８】これにより、ＰＤＰ１の表示画面のコント
ラストが向上し、同表示画面のまぶしさが抑えられ、き
れいな画像を表示することができる。As a result, the contrast of the display screen of the PDP 1 is improved, the glare of the display screen is suppressed, and a clear image can be displayed.
【００２９】当該装置を配置した室内の温度が高い場
合、上記同様のファジィ制御によりＰＤＰ１の温度を抑
えるように、例えば入力映像信号の輝度等（また表示パ
ルス数等）を多少下げる制御データを算出し、表示画面
の明るさによってそのＰＤＰ１の温度がより上昇する場
合、上記同様のファジィ制御により同ＰＤＰ１の温度上
昇を抑えるように、例えば入力映像信号の輝度等（また
表示パルス数等）を多少下げる制御データを算出する。When the temperature in the room where the apparatus is placed is high, control data for slightly lowering the brightness of the input video signal (and the number of display pulses, etc.) is calculated so as to suppress the temperature of the PDP 1 by fuzzy control similar to the above. However, when the temperature of the PDP 1 further rises due to the brightness of the display screen, for example, the brightness of the input video signal (and the number of display pulses) is adjusted to some extent so that the temperature rise of the PDP 1 is suppressed by the fuzzy control similar to the above. Calculate control data to lower.
【００３０】これにより、ＰＤＰ１の故障を少なくし、
寿命を延ばすことができ、しかも表示画像の画質を低下
させずに済み、またＰＤＰ１の温度がそれほど高くない
ときには表示画像の輝度を大きくし、より良好な画像を
表示することができる。なお、そのＰＤＰ１の寿命を気
にしないようであれば、例えば画像をよりきれいに表示
するために必要な輝度をとるファジィ制御が可能であ
る。As a result, the failure of the PDP 1 is reduced,
It is possible to extend the life, and further, it is not necessary to reduce the image quality of the display image, and when the temperature of the PDP 1 is not so high, the brightness of the display image can be increased and a better image can be displayed. If the life of the PDP 1 is not taken into consideration, fuzzy control can be performed to obtain the brightness necessary for displaying an image more beautifully, for example.
【００３１】このように、入力映像信号により、表示画
像（表示画面上）の輝度、色相の空間分布およびその時
間的変化を検出するととももに、表示パネルの周囲の明
るさ（入射光量）および同表示パネルの各部位の温度を
検出し、これら検出した情報に基づいて表示パネルの入
力信号の特性（ガンマ値等）、表示パネルの表示パラメ
ータ（階調数、最小階調数当りの表示ビット数等）を総
合的に最適化している。As described above, the brightness of the display image (on the display screen), the spatial distribution of the hue, and the temporal change thereof are detected from the input video signal, and the brightness (incident light amount) around the display panel and The temperature of each part of the display panel is detected, and the characteristics of the input signal of the display panel (gamma value etc.), the display parameters of the display panel (the number of gray scales, the display bit per the minimum number of gray scales) based on the detected information. (Numbers, etc.) are comprehensively optimized.
【００３２】したがって、入力映像信号、ＰＤＰ１の周
囲の状況に対応して最適な画像を表示することができ、
例えばテレビ画面では視聴者がきれいな画像をみること
ができ、ひいてはＰＤＰ１による大画面テレビジョンの
実現が可能となる。Therefore, an optimum image can be displayed in accordance with the input video signal and the surroundings of the PDP 1.
For example, the viewer can see a beautiful image on the TV screen, and eventually a large screen television can be realized by the PDP 1.
【００３３】[0033]
【発明の効果】以上説明したように、この発明の画像表
示方法およびその装置によれば、入力映像信号により、
表示画像（表示画面上）の輝度、色相の空間分布および
その時間的変化を検出するととももに、表示パネルの周
囲の明るさ（入射光量）および同表示パネルの各部位の
温度を検出し、これら検出した情報に基づいて表示パネ
ルの入力信号の特性（ガンマ値等）、表示パネルの表示
パラメータ（階調数、最小階調数当りの表示パルス数
等）を最適化するようにしたので、入力映像信号、表示
パネルの周辺（入射光量、室温）の状況に応じて最適な
表示画像、つまりきれいな表示画像を得ることができ、
具体的には黒つぶれ、白つぶれがなく、コントラストも
良好で、色再現域を広くして色再現性も良好とする画像
を得ることができる。As described above, according to the image display method and the apparatus thereof of the present invention, the
In addition to detecting the brightness of the display image (on the display screen), the spatial distribution of hues, and its temporal change, the brightness (incident light amount) around the display panel and the temperature of each part of the display panel are detected. Since the characteristics of the input signal of the display panel (gamma value, etc.) and the display parameters of the display panel (the number of gradations, the number of display pulses per minimum number of gradations, etc.) are optimized based on these detected information, Depending on the input video signal and the surroundings of the display panel (incident light intensity, room temperature), an optimal display image, that is, a beautiful display image can be obtained.
Specifically, it is possible to obtain an image having no blackout or whiteout, good contrast, a wide color reproduction range, and good color reproducibility.
【図１】この発明の一実施例を示す画像表示装置の概略
的ブロック線図。FIG. 1 is a schematic block diagram of an image display device showing an embodiment of the present invention.
【図２】図１に示す画像表示装置の動作および画像表示
方法の作用を説明する概略的表示輝度特性図。FIG. 2 is a schematic display luminance characteristic diagram for explaining the operation of the image display device shown in FIG. 1 and the operation of the image display method.
１ ＰＤＰ（プラズマディスプレイパネル） ２ 検出系部 ２ａ 空間分布検出部（輝度、色相の） ２ｂ 時間的変化検出部（輝度、色相の空間分布の） ２ｃ パネル入射光量検出部 ２ｄ パネル温度検出部 ３ ファジィ制御部 ４ 出力制御部 ５ パネル表示制御部 1 PDP (plasma display panel) 2 Detection system unit 2a Spatial distribution detection unit (luminance and hue) 2b Temporal change detection unit (luminance and hue spatial distribution) 2c Panel incident light amount detection unit 2d Panel temperature detection unit 3 Fuzzy Control unit 4 Output control unit 5 Panel display control unit
Claims (3)
（ＰＤＰ）に表示する際、同入力映像信号から同表示パ
ネルにそのまま表示したときの表示画像の特性を検出
し、かつ同表示パネルの状況を検出し、該検出した情報
に応じて前記表示パネルの入力信号の特性、同表示パネ
ルの種々パラメータ値を総合的に最適化するようにした
ことを特徴とする画像表示方法。1. When displaying an image based on an input video signal on a display panel (PDP), the characteristics of the display image when the image is directly displayed on the display panel from the input video signal are detected, and the status of the display panel is detected. A method for displaying an image, characterized in that the characteristics of an input signal of the display panel and various parameter values of the display panel are comprehensively optimized in accordance with the detected information.
（ＰＤＰ）に表示する際、同入力映像信号により表示画
像の輝度、色相の空間分布および同空間分布の時間的な
変化を検出するとともに、表示パネルの周囲の明るさを
および同表示パネルの温度を検出し、該検出した複数の
情報に基づいて前記表示パネルの入力信号のガンマ値、
振幅、レベル、白および黒の伸張特性と同表示パネルの
表示階調数、最小階調数当りの表示パルス数とを補正
し、前記表示パネルの入力信号の特性、同表示パネルの
種々パラメータ値を総合的に最適化するようにしたこと
を特徴とする画像表示方法。2. When displaying an image based on an input video signal on a display panel (PDP), the input video signal detects the brightness of the display image, the spatial distribution of hue, and the temporal change of the spatial distribution, and displays the same. The brightness around the panel and the temperature of the display panel are detected, and the gamma value of the input signal of the display panel based on the plurality of detected information,
Amplitude, level, white and black expansion characteristics and the number of display gradations of the same display panel, the number of display pulses per minimum number of gradations are corrected, and the characteristics of the input signal of the display panel and various parameter values of the same display panel are corrected. The image display method is characterized in that the above is optimized comprehensively.
（ＰＤＰ）に表示する画像表示装置において、 前記入力映像信号により表示画像の輝度および色相の空
間分布を検出する空間分布検出手段と、 前記入力映像信号により表示画像の輝度および色相空間
分布の時間的変化を検出する時間的変化検出手段と、 前記表示パネルの周囲照明光からの入射光量を検出する
入射光量検出手段と、 前記表示パネルの温度を検出する温度検出手段と、 前記検出輝度、色相の空間分布および同空間分布の時間
的変化と、前記検出入射光量と、前記検出温度による表
示パネルの各部位の温度とを入力し、前記入力映像信号
による表示画像を前記表示パネルに表示するために同表
示パネルに入力する信号の各種値や同表示パネルの各種
パラメータを所定に変える制御データを算出するファジ
ィ制御手段と、 該ファジィ制御手段によって算出した制御データによ
り、少なくとも前記入力映像信号のガンマ値、白および
黒部との伸張特性、振幅、レベルを変え、同入力映像信
号を補正して前記表示パネルに出力する出力制御手段
と、 前記ファジィ制御手段によって算出した制御データによ
り、少なくとも前記表示パネルの表示サブフィールド
数、最小階調当りの表示ビット数を制御するパネル表示
制御手段とを備えたことを特徴とする画像表示装置。3. An image display device for displaying an image according to an input video signal on a display panel (PDP), a spatial distribution detecting means for detecting a spatial distribution of brightness and hue of a display image by the input video signal, and the input video. A temporal change detecting means for detecting a temporal change of the brightness and hue spatial distribution of the display image by a signal, an incident light amount detecting means for detecting an incident light amount from ambient illumination light of the display panel, and a temperature of the display panel. Temperature detection means for detecting, the detected brightness, the spatial distribution of hue and the temporal change of the spatial distribution, the detected incident light amount, and the temperature of each part of the display panel due to the detected temperature is input, the input image In order to display a display image by the signal on the display panel, various values of signals input to the display panel and various parameters of the display panel are changed to predetermined values. The fuzzy control means for calculating the control data and the control data calculated by the fuzzy control means correct at least the gamma value of the input video signal, the expansion characteristics with respect to the white and black parts, the amplitude and the level to correct the input video signal. Output control means for outputting to the display panel, and panel display control means for controlling at least the number of display sub-fields of the display panel and the number of display bits per minimum gradation by the control data calculated by the fuzzy control means. An image display device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5100233A JP2900966B2 (en) | 1993-04-02 | 1993-04-02 | Image display method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5100233A JP2900966B2 (en) | 1993-04-02 | 1993-04-02 | Image display method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06289812A true JPH06289812A (en) | 1994-10-18 |
| JP2900966B2 JP2900966B2 (en) | 1999-06-02 |
Family
ID=14268559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5100233A Expired - Lifetime JP2900966B2 (en) | 1993-04-02 | 1993-04-02 | Image display method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2900966B2 (en) |
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